#5159BF
Closest named color: Iris (#6258C4). oklch(51.3% 0.158 275.9), rgb(81, 89, 191).
Aa
White text reads best on this color (5.94:1).
About this color
#5159BF is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.158 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.026 away. White text reads best on it, at 5.94:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.158) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.53:1 |
| White text | 5.94:1 |
Values
| HEX | #5159BF |
| RGB | rgb(81, 89, 191) |
| HSL | hsl(236, 46%, 53%) |
| OKLCH | oklch(51.3% 0.158 275.9) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #5159BF | 5.94:1 | AA | Lc -84.7 | Fine for body text |
| Black text on #5159BF | 3.53:1 | AA large text | Lc 24.6 | Dividers and decoration only |
| #5159BF text on white | 5.94:1 | AA | Lc 79.4 | Fine for body text |
| #5159BF text on black | 3.53:1 | AA large text | Lc -22.4 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 700.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#D1D7F6
oklch(88.4% 0.043 276.8)
-
Step 300
300
#B3BDF2
oklch(80.9% 0.076 276.3)
-
Step 400
400
#8C99EC
oklch(70.7% 0.122 276)
-
Step 500
500
#717EE6
oklch(63.2% 0.155 275.7)
-
Step 600
600
#5B64D4
oklch(55.5% 0.17 275.9)
-
Step 700
700 (this color)
#5159BF
oklch(51.3% 0.158 275.9)
-
Step 800
800
#3E4495
oklch(42.7% 0.131 276.2)
-
Step 900
900
#343A76
oklch(37.6% 0.101 276.1)
-
Step 950
950
#1E2345
oklch(27.1% 0.063 275.1)
#5159BF with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #1B68C3 | 0.056 |
| Deuteranopia (no green cones) | #005FBD | 0.061 |
| Tritanopia (no blue cones) | #087083 | 0.138 |
| Achromatopsia (no color) | #646464 | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5159BF
#5159BF
oklch(51.3% 0.158 275.9)
- #796600
#796600
oklch(51.3% 0.106 96.2)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #5159BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.026
- Slate Blue #6A5ACD ΔE 0.044
- Warm Blue #4B57DB ΔE 0.045
- Dark Periwinkle #665FD1 ΔE 0.045
- Light Indigo #6D5ACF ΔE 0.049
- Bluey Purple #6241C7 ΔE 0.058
- French Blue #436BAD ΔE 0.060
- Mid Blue #276AB3 ΔE 0.062
Use #5159BF in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.